In my yakuake window there are two strange buttons. The left one says "no text", the right one looks something like ">>". If I click on the left button, then a submenu opens, featuring the items "Open Browser Here" and "Close Tab". The right button opens a submenu with four items called "no text", leading to different submenus. I include a screenshot.
Created attachment 36461 [details] Screenshot featuring the strange "no text" menus in yakuake.
*** This bug has been marked as a duplicate of bug 186745 ***